Error: Somsome parameters or credential values are missing

Question

I have the drill through working to a certain extinct, I can drill down through each rdlc via hyperlink, When I get to the last report , on the reportview it has a option to go back to the parent report, when I click that button, I get a error that saids some parameters or credential values are missing, anyone familiar with this error, how can you tell parametes are missing, when I step through I seem to have all the parameters I need